We report here the experimental set-up and results of the chemical reaction in plasma initiated by TEA CO2 laser in methane and ethane which have been changed to actylene and ethylene. In methane, the degree of conversion to actylene is 93%. In ethane, the degree of conversion to actylene and to ethylene is 81.5% and 19.3% respectively. In mixture of methane and ethane,the degree of conversion from ethane to ethylene is as high as 37%. A brief discussion about the process of chemical reaction in...